Engraving-machine.



No. 888,141. W' W PATENTEUSBT. 8, 1808.

ENGRAVING MACHINE.

APPLICATION FILED AUG. 17, 1906.

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W. W. SAWYER.

BNGRAVING MACHINE.

APPLICATION FILED AUG. 17, 1906.

. -PATENTED SEPT. 8, 1908.

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ENGRAVING MACHINE.

APPLICATION-ULEB AUG. 17, 1906.

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UNITED STATES PATENT OEFTOE.

'WILLARD W. SAWYER, OE NEW YORK, N. Y., ASSIGNOR TO THE BATES MACHINECOMPANY,

OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

ENG-RAVING-MACHIN E Specification of Letters Patent.

Patented Sept. 8, 1908.

Application filed August 17, 1906. Serial No. 330,969.

To all whom it may concern:

Be it known that I, WILLARD W'. SAWYER, a citizen of the United States,residing at Brooklyn, New York city, county of Kings, and State of NewYork, have invented new and useful Improvements in Engraving-Hachines,of which the following is a clear, full, and exact description.

The object of this invention is to provide an improved engraving orrouting machine and particularly one which may make use of one or morespindles and which is capable of producing work of different sizewithout changing the pantograph arm or pattern plate.

I have illustrated my preferred embodiment of this invention in theaccompanying drawings in which Figure 1 is a front elevation of myimproved machine; Eig. 2 is a side elevation thereof; Fig. 3 is a planthereof; Fig. 4 is a detail disconnected of the adjusting means forvarying size of work; Fig. 5 is a section on the center line of thespindle, and Eig. 6 is a plan of the work clamp. Fig. 7 is a plan viewof half of the pattern plate shown in Fig. 1.

Theframe of the machine is composed of two side frame plates 1, boltedto a base plate 2, and strengthened by a brace plate 3 inclined to thevertical with its lower ends nearer the back of the machine frame. Onthe front edges of the side plates 1 are machined guides 4 preferablywith beveled sides to lit channels in a vertically movable work table 5which may be secured in position by set screws 6. Dovetailed guides orguide 7 run transversely across the work table 5, on which channeledblocks 8 may be adjusted and set by set screws 9. A bracket 10 havingdovetailed guide 11 runs in a channel in the block 8, at right angles tothe one before described, and a nut serves to fasten it thereto. Thebracket 10 carries an upright right angular arm 13 having an arm 14pivoted at its outer end and a pivotal screw 15 at its other end. Thescrew passes through the arm 14 and a thumb nut 16 is secured onthe'out- -side of the arm so that a blank to work upon may be graspedbetween the upright 13 and arm 14 and securely held by the turning ofthe thumb nut 16.

Upon the base plate 2 there is mounted a shallow rim 17 having acircular center openpassage of a bolt 18. A circular pattern plate 19 isinserted into the circular hole and the bolt 18 inserted to engage anotch in the plate for properly registering its position.

The spindles and pantograph arm are carried by a bed plate 20 hinged at21 to the side frame plates 1. The pantograph arm 27 is provided with ahandle 28 mounted adjustably thereon by a set screw 29 and carries atracer 30 at its end. It is mounted at its upper end by two pivotalscrews 26 passing through a collar or ring 24 in turn held by pivotalscrews 25, in the arm 23 of the bifur cated bracket 22 rigidly securedto the bed plate 20.

The spindles are carried in a carrier body or plate 31 mounted on thehinged bed plate 20. The bed plate 20 on each side has parallel rollers32, free to rotate and held by pivotal screws 33. These rollers arepreferably iiuted, corrugated or grooved circumferentially. The bodyplate 31 for the spindles has front and back parallel rolls 34 held bypivotal set screws 35 and where they contact with the rolls 32, they areiuted longitudinally to fit the circumferential iiutes of the otherrolls. It will be obvious that the plate 31 can therefore be moved inany direction in a horizontal plane. To keep it down in place I provideangle brackets 36 on the bed plate 20 provided with set screws 37 withflat disks 38 bearing lightly on top of the body plate 31.

A centerhole is left through the body plate 31 for the free passage ofthe pantograph arm 27 and a bracket 39 is secured to the plate 31 havinga central opening with overlapping clamping plates 40 secured withscrews 41l to the bracket 39 (see Fig. 4). Upon the pantograph arm 27 Imount a slidable sleeve 41 carrying a ball joint 42 in a socketed crosshead 43. This cross head 43 may be clamped in any position in thebracket 39 by the overlapping plates 40.

The spindles may be any number desired and are preferably located alongthe front line of the body plate 31, upon raised abutments 44. They mayconsist of an outer stationary sleeve 45 threaded at its upper end andprovided with an adjusting nut 46 for vertically positioning it withrelation to its abutment 44. A rotatable spindle 47 is located withinthe sleeve 45. It is threaded at its upper end and carries a pulley 48ing and a channel in its lower part for the l screwed thereon and lockedin position by a lock nut 49. The loWer inner bore of the spindle istapered. In the taper of the inside a split tapered vise 50 is providedcarrying the tool 51. The vise 50 is on one end of a rod 52 threaded atits upper end Where it extends from the rotating spindle 47 and iscapped by a thumb nut 52 for longitudinally moving the spindle forclamping the tool 51. Set screws 53 passing through the body plate serveto hold the spindle sleeve in position. v

Usual belting from the spindle pulley 48 passes over idle pulley 54, onthe arm 55 pivoted at 56 to the bracket 57 bolted to the side plates 1,and a spring 58 may be used to tension such arm, so that the slack maybe taken up when required. A hook 59 may be fastened to the bracket 22for attachment of counter balancing means to aid the operator in liftingthe spindles, arm and bed plate 20 on its hinge 21.

In order to properly gage the height of all the spindle tools, l makeuse of a gage bracket 60 bolted to the frame and having an open cylinder61 immediately above a set screw 62 so that When a tool rests on the setscrew the adjusting nut 46 may be set flush with the top ofthe cylinder61 and a standard for all spindles thus set for a given piece of Work.

I claim as my invention:

1. An engraving machine comprising a standard, a bed plate hingedthereto, a bracket secured to the bed plate, a universal joint carriedby the bracket, a tracer arm hung in the universal joint, a carrierplate, through which the tracer arm passes and to which it is connected,a pattern for one end of the tracer arm, said carrier plate beingadapted to tilt With the bed plate and move in any direction in a planeparallel With said bed plate, and rotating spindles carried by saidcarrier plate. I

2. An engraving machine comprising a standard, a bed plate hingedthereto, a bracket secured to the bed plate, a universal joint carriedbythe bracket, a tracer arm hung in the universal joint, a carrier plate,through which the tracer arm passes and to which it is connected, apattern for one end of the tracer arm, said carrier plate being adaptedto tilt with the bed plate and move in any direction in a plane parallelWith said bed plate, and rotating spindles carriedby said carrier plate,the connection between tracer arm and carrier plate comprising a socketon the carrier plate, a ball and a sliding sleeve therefor on the arm.

Signed at Brooklyn, Newl York, this 13th day of August, 1906.

, WILLARD W. SAWYER.

Witnesses:

EDWIN G. BATES, F. WARREN WRIGHT.

